:root{--blue:#1677EE;--blue2:#3395FF;--deep:#0A315E;--deep2:#071D37;--ink:#16243A;--text:#3C485A;--muted:#6B7787;--line:rgba(22,119,238,.12);--pale:#F7FAFF;--ice:#EDF5FF;--soft:#E5F1FF;--shadow:0 12px 34px rgba(30,72,120,.08);--brand-shadow:0 14px 40px rgba(22,119,238,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input{font:inherit}.container{width:min(1320px,calc(100% - 48px));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid 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.reading-note{width:min(900px,calc(100% - 48px));margin:0 auto 76px;padding:30px 32px;border-radius:24px;background:#f7faff;border:1px solid rgba(22,119,238,.12)}.reading-note h2{margin:0 0 12px;color:#16243A;font-size:28px}.reading-note p{margin:12px 0 0}.reading-note .eyebrow{margin-bottom:8px}@media(max-width:900px){.reading-note{width:min(100% - 30px,900px);padding:24px 22px;margin-bottom:56px}.reading-note h2{font-size:24px}}